|Pos|No|Rider|Manufacturer|Laps|Time|Grid|Points|
|---|---|---|---|---|---|---|---|
|1|46|Valentino Rossi|Yamaha|21|43:06.007|2|25|
|2|2|Dani Pedrosa|Honda|21|+4.008|1|20|
|3|4|Andrea Dovizioso|Honda|21|+8.536|6|16|
|4|69|Nicky Hayden|Honda|21|+8.858|4|13|
|5|56|Shinya Nakano|Honda|21|+10.583|15|11|
|6|1|Casey Stoner|Ducati|21|+13.640|7|10|
|7|65|Loris Capirossi|Suzuki|21|+15.936|8|9|
|8|5|Colin Edwards|Yamaha|21|+18.802|5|8|
|9|7|Chris Vermeulen|Suzuki|21|+23.174|11|7|
|10|14|Randy de Puniet|Honda|21|+25.516|9|6|
|11|21|John Hopkins|Kawasaki|21|+27.609|10|5|
|12|13|Anthony West|Kawasaki|21|+41.399|13|4|
|13|50|Sylvain Guintoli|Ducati|21|+45.617|16|3|
|14|15|Alex de Angelis|Honda|21|+49.003|17|2|
|15|24|Toni Elias|Ducati|21|+59.139|19|1|
|16|33|Marco Melandri|Ducati|21|+1:03.328|14||
|17|9|Nobuatsu Aoki|Suzuki|21|+1:48.363|18||
|Ret|48|Jorge Lorenzo|Yamaha|12|Accident|3||
|Ret|52|James Toseland|Yamaha|2|Accident|12||

Question: how many riders used a motorcycle manufactured by honda?
Answer: 6